.text_overflow_handler{
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.main-wrapper{
    width: 1200px;
    margin:0 auto;
}
.section-content{
    display: flex;
    justify-content: space-between;
}
.left-content{
    width: 872px;
    height: 528px;
    margin-right: 33px;
}
.right-content{
    width: 295px;
}




.section-header {
    position: relative;
    display: flex;
    justify-content: space-between;
  }
  .section-header .header-left {
    font-size: 22px;
    line-height: 25px;
    width: 150px;
    text-indent: 33px;
    font-weight: 600;
    margin-bottom: 16px;
    background: url(./images/main_index.png) no-repeat 0 -106px;
  }
  .section-header .header-right {
    color: #999;
    position: absolute;
    top: 0px;
    right: 0px;
  }
  .section-header .header-right:hover {
    color: #f3c258;
  }
  .section-header .header-right .icon-more {
    display: inline-block;
    height: 28px;
    width: 17px;
    vertical-align: middle;
    background: url(./images/main_index.png) no-repeat -252px 4px;
  }
  .tab_nav {
    width: 100%;
    display: flex;
    height: 32px;
    line-height: 29px;
    background-color: #f5f5f5;
    margin-bottom:19px;
  }
  .tab_nav .tab_nav_item {
    flex: 1;
    text-align: center;
    color: #999;
  }
  .tab_nav .tab_nav_item:hover {
    color: #333333;
    border-bottom: 3px solid #f3c258;
  }
  .tab_keywords {
    display: flex;
    margin-top: 10px;
    flex-wrap: wrap;
  }
  .tab_keywords .keyword {
    height: 24px;
    line-height: 24px;
    padding: 0 13px 0 8px;
    border: 1px solid #e5e5e5;
    border-radius: 10px;
    background: #f5f5f5;
    font-size: 14px;
    color: #333;
    margin: 0 8px 8px 0;
    display: block;
  }
  .tab_keywords .keyword:hover {
    background-color: #f3c258;
    color: #f5f5f5;
  }
  .video-list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .video-list .video-item{
      margin-bottom: 20px;
  }
  .video-list .video-item:hover .cover{
    animation: opacityAnim 400ms ease forwards;
  }
  .video-list .video-item .image {
    width: 212px;
    position: relative;
  }
  .video-list .video-item .image img{
    width: 212px;
  }
  .video-list .video-item .image .info {
    position: absolute;
    bottom: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 209px;
    height: 22px;
    line-height: 22px;
    padding: 0 10px;
    box-sizing: border-box;
    color: #fff;
    background: rgba(0, 0, 0, 0.6);
    font-size: 12px;
    border-radius: 0 0 2px 2px;
  }
  .video-item .image .info .count {
    padding: 0 0 0px 15px;
  }
  .icon-play {
    background: url(./images/main_index.png) no-repeat -256px -60px;
  }

  .video-item .image .cover{
    opacity: 0;
    position: absolute;
    top: 0;
    display: flex;
    justify-content:center;
    align-items: center;
    width: 212px;
    height: 127px;
    background:rgba(0, 0, 0, 0.6);
  }
  .video-item .image .cover .cover-icon-play{
    width: 40px;
    height: 40px;
    background: url(./images/main_index.png) no-repeat  -192px -64px;
  }
  .video-item .desc {
    margin-top: 8px;
    width: 209px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }

  .main{
    background: url(./images/main_bg.jpg)
  }
  .main .main-link{
    display: block;
    width: 1200px;
    height: 400px;
    margin: 0 auto;
  }